Cant hear sound after following screen replacement with frame guide

So I got a finished with this Guide and was so happy as its my first time repairing something, or so I thought as I tested it out and made a phone call where both lines of the other end could hear each other perfectly fine as usually. I came across the problem of not being able to hear notifications, so I tried playing music nothing was audible. The next day I disassemble the phone, and follow the video looking for any I may have made, the only thing that I didn't do and the video did do was remove the old earpiece onto the new display assemble, but didn't do that because it looked like that a new earpiece already came with the new display assemble.

Guys please help me fix this issue, I don't want all that enthusiasm to be ruined by this.

4개의 답변

Make sure that the contacts on the display frame are lined up correctly with the loud speaker and that the flex cable is actually there. The contacts on the loud speaker look like they could be bent up to make better contact as well. This photo shows the contacts clearly.

Ok I think I found the problem but I don't know how to solve it. So when looking at Josiah's photo with the circle on the left with one of the gold patches extending further on the orange logic board. And the screen I ordered its orange one doesn't have conductor that extended that far. I have taken a photo of my screen with frame (https://onedrive.live.com/redir?resid=EF...) and the red circle shows where the gold patches are for this orange board, but my old logic board is green and is like Josiah photo as its the same formation, with on my photo where the green circle is where a gold patch is suppose to be for the audio box connection.

So my question is how do I switch my old logic board with the new one to put on my new screen with the frame?

I was thinking that this phone has two speakers but it looks like it uses the earpiece speaker as a ringer too. I could be wrong.

Anyway I looked at a Nokia Lumia 635 screen assembly and it turns out you can take out the earpiece speaker from the old screen. You need to pry the eariece speaker off as it's stuck with adhesive on top of the metal plating.

Took one out successfully so it isn't too hard. Sometimes the pre-installed one can be faulty.

I would like to find out why there are three contact points for the loudspeaker...what are the third contact point for...as my phone does not have any sound..only having sound when i bridge the third one with the negative terminal (contact point)

It looks to me like the lower left contact just grounds the frame of the LCD to the logic board and has nothing to do with the loudspeaker. Could you upload a photo? Is the lower left contact able to touch the lcd frame, or is it connected to the speaker through the flex cable?

I really don't know what the problem would be. You can test the connections by jumping the speaker inputs to the outputs on the board. A more sure test would be to cut a 3.5 mm cable apart and hard wire the speaker to the cable to test the speaker from the headphone port of another device. If you do both tests then you can determine the actual cause.